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-rw-r--r--src/runtime/haskell-bind/PGF2/FFI.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/runtime/haskell-bind/PGF2/FFI.hs b/src/runtime/haskell-bind/PGF2/FFI.hs
index ce4dd6983..85c3a9793 100644
--- a/src/runtime/haskell-bind/PGF2/FFI.hs
+++ b/src/runtime/haskell-bind/PGF2/FFI.hs
@@ -331,6 +331,9 @@ foreign import ccall "pgf/expr.h pgf_expr_eq"
foreign import ccall "pgf/expr.h pgf_expr_hash"
pgf_expr_hash :: Word -> PgfExpr -> IO Word
+foreign import ccall "pgf/expr.h pgf_expr_size"
+ pgf_expr_size :: PgfExpr -> IO CInt
+
foreign import ccall "pgf/expr.h pgf_compute_tree_probability"
pgf_compute_tree_probability :: Ptr PgfPGF -> PgfExpr -> IO CFloat